Liverpool also lost Luis Suarez to Barca when he decided his time was up on Merseyside.

It takes the huge amount of loyalty shown by Steven Gerrard to stay for the peak years of a superstar’s career at Anfield.

But even if Real are kept waiting, they tend to get their man.

Calderon added: “I have had the same experience with Ronaldo and United but finally he got an agreement. He kept his promise and did it — he wanted it one year before but it was perfect in the end.”

Jurgen Klopp says player of the year Mo Salah has been ‘outstanding’ for Liverpool and has potential to get even better

Calderon actually believes Tottenham’s Harry Kane is the ideal player for Real this summer but knows it will be almost impossiblehttp://harry kane the su to get the prolific striker.

He said: “Kane is perfect. He is the player that Real Madrid would like to sign but we know how Daniel Levy (Spurs chairman) is with negotiations — we saw that with Luka Modric and Gareth Bale — and it will be difficult.

“I don’t know if Spurs would let him leave as they are going into a new stadium.”

Calderon was at the Parc des Princes, Paris, in 1981 when Liverpool beat Real Madrid to win the European Cup.